Emmentaler & friends

[Massimiliano Viel]

Hello everyone!
Just a hopefully simple question: I tried to open the pdf generated by 
Lilypond/Frescobaldi with Illustrator and Affinity Design for  fine tuning.
Of course I met the problem that some fonts were missing (almost everyone with 
Designer!).
Therefore I’m in search of the proper fonts to install so that they are 
available to the DTP programs I use.
Can anybody please point me to the font repository or tell me if I’m not doing 
it properly?

Thank you for any help!

Massimiliano